SDL_CreateTexture

Use this function to create a texture for a rendering context.
使用该函数可以为特定渲染器创造一个纹理。

Syntax 语法

SDL_Texture* SDL_CreateTexture(SDL_Renderer* renderer,
                               Uint32        format,
                               int           access,
                               int           w,
                               int           h)

Function Parameters 函数参数

Return Value 返回值

Returns a pointer to the created texture or NULL if no rendering context was active, the format was unsupported, or the width or height were out of range; call SDL_GetError() for more information.
返回一个指针指向被创造的纹理，但如果没有活动的渲染器，或者format格式不被支持，或者宽度或高度超过限度，则返回NULL，调用SDL_GetError()以获取更多的错误信息。

Code Examples 代码示例

#include "SDL.h"
/* Moving Rectangle 移动的矩形*/
int main(int argc, char *argv[])
{
        SDL_Window *window;
        SDL_Renderer *renderer;
        SDL_Texture *texture;
        SDL_Event event;
        SDL_Rect r;
        if (SDL_Init(SDL_INIT_VIDEO) < 0) {
                SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s", SDL_GetError());
                return 3;
        }
        window = SDL_CreateWindow("SDL_CreateTexture",
                        SDL_WINDOWPOS_UNDEFINED,
                        SDL_WINDOWPOS_UNDEFINED,
                        1024, 768,
                        SDL_WINDOW_RESIZABLE);
        r.w = 100;
        r.h = 50;
        renderer = SDL_CreateRenderer(window, -1, 0);
        texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, 1024, 768);
        while (1) {
                SDL_PollEvent(&event);
                if(event.type == SDL_QUIT)
                        break;
                r.x=rand()%500;
                r.y=rand()%500;
                SDL_SetRenderTarget(renderer, texture);
                SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0x00);
                SDL_RenderClear(renderer);
                SDL_RenderDrawRect(renderer,&r);
                SDL_SetRenderDrawColor(renderer, 0xFF, 0x00, 0x00, 0x00);
                SDL_RenderFillRect(renderer, &r);
                SDL_SetRenderTarget(renderer, NULL);
                SDL_RenderCopy(renderer, texture, NULL, NULL);
                SDL_RenderPresent(renderer);
        }
        SDL_DestroyRenderer(renderer);
        SDL_Quit();
        return 0;
}

Remarks 注意

format may be one of the following:
参数format可以是以下值中的一个：

access may be one of the following:
参数access可以是以下值中的一个：

You can set the texture scaling method by setting SDL_HINT_RENDER_SCALE_QUALITY before creating the texture.
在创造纹理之前，你可以设置SDL_HINT_RENDER_SCALE_QUALITY的值来设定纹理的缩放质量。

Related Functions 相关函数

SDL_CreateTextureFromSurface
SDL_DestroyTexture
SDL_QueryTexture
SDL_UpdateTexture

Translated by SteDeshain
Reference to http://wiki.libsdl.org/SDL_CreateTexture